public static string GetPreviousWordAtIndex(this AvaloniaEdit.TextEditor editor, int index)
{
var lastWordIndex = TextUtilities.GetNextCaretPosition(editor.Document, index, LogicalDirection.Backward, CaretPositioningMode.WordBorder);
if (lastWordIndex >= 0 && editor.Document.GetLocation(lastWordIndex).Line == editor.Document.GetLocation(index).Line)
{
return(editor.GetWordAtIndex(lastWordIndex));
}
else
{
return(editor.GetWordAtIndex(index));
}
}
public static string GetWordAtIndex(this AvaloniaEdit.TextEditor editor, int index)
{
var result = string.Empty;
if (index >= 0 && editor.Document.TextLength > index)
{
var start = index;
var currentChar = editor.Document.GetCharAt(index);
var prevChar = '\0';
if (index > 0)
{
prevChar = editor.Document.GetCharAt(index - 1);
}
var charClass = TextUtilities.GetCharacterClass(currentChar);
if (charClass != CharacterClass.LineTerminator && prevChar != ' ' && TextUtilities.GetCharacterClass(prevChar) != CharacterClass.LineTerminator)
{
start = TextUtilities.GetNextCaretPosition(editor.Document, index, LogicalDirection.Backward, CaretPositioningMode.WordStart);
}
var end = TextUtilities.GetNextCaretPosition(editor.Document, start, LogicalDirection.Forward, CaretPositioningMode.WordBorder);
if (start != -1 && end != -1)
{
var word = editor.Document.GetText(start, end - start).Trim();
if (word.IsSymbol())
{
result = word;
}
}
}
return(result);
}
private void InitializeControls()
{
Background = Brushes.Transparent;
MaxWidth = 3000;
ColumnDefinitions = new ColumnDefinitions("*");
RowDefinitions = new RowDefinitions("*");
HorizontalAlignment = HorizontalAlignment.Stretch;
VerticalAlignment = VerticalAlignment.Stretch;
TextEditor = new TabControlTextEditor()
{
IsReadOnly = true,
HorizontalAlignment = HorizontalAlignment.Stretch,
VerticalAlignment = VerticalAlignment.Top,
MaxWidth = 3000,
MaxHeight = 2000,
Foreground = Theme.GridForeground,
Background = Theme.GridBackground,
// WordWrap = true, // Doesn't work yet
// HorizontalScrollBarVisibility = ScrollBarVisibility.Disabled, // WordWrap requires Disabled
HorizontalScrollBarVisibility = ScrollBarVisibility.Auto,
VerticalScrollBarVisibility = ScrollBarVisibility.Auto,
Padding = new Thickness(6),
FontSize = 14,
SyntaxHighlighting = HighlightingManager.Instance.GetDefinition("JavaScript"), // handles JSON too
};
TextEditor.Options.AllowScrollBelowDocument = false; // Breaks top alignment
Children.Add(TextEditor);
//textEditor.TextArea.IndentationStrategy = new AvaloniaEdit.Indentation.CSharp.CSharpIndentationStrategy();
/*ShowLineNumbers = true;
* SyntaxHighlighting = HighlightingManager.Instance.GetDefinition("C#");*/
}